Figure 3
Structure of S-adenosyl-S-carboxymethyl-L-homocysteine (SCM-SAH). The final coordinates are displayed with (a) the likelihood-weighted mFo - DFc difference electron-density maps contoured at 3[sigma] calculated prior to the modelling of SCM-SAH and (b) the 2mFo - DFc electron-density maps contoured at 1.5[sigma]. The SCM-SAH model is shown with C atoms in cyan, O atoms in red and N atoms in blue. C atoms of protein residues are shown in green.  [article HTML]